The Bilstein 37-239817 Coil Spring is designed to fit the 2004-2010 BMW X3. Does not fit vehicles with sport suspension. Made of durable alloy steel, this front suspension spring is manufactured in Germany with 100% accuracy of fit. It comes with a 1-year manufacturer warranty and features standard duty performance for a reliable and safe driving experience. Additionally, this black spring is a non-performance part that ensures quality and safety for your vehicle.